NDACC News

New output for 2018 is available for all stations. All file types from 1985-2017 have been revised – either corrected or improved; see details below. The new files have ‘MR2V2’ in the name to distinguish them as version 2 (V2) files that were created from a simulation integrated with MERRA2. All files can be downloaded via anonymous ftp from ModelDataLink. The files are generated from a GMI chemistry transport model (CTM) simulation integrated with MERRA2 reanalysis meteorology.

Ralf Zuber et al. on the validation of a new array spectroradiometer: A measurement system consisting of two array spectroradiometers, a UV-BTS and a VIS-BTS was set up, to achieve a wavelength range from 200 nm to 1050 nm. This system has been compared with the NDAC travelling UV spectroradiometer, which id a double monochromator-based device that complies to the NDACC specifications at a measurement campaign for spectral global irradiance with the aim to validate an array spectroradiometer as well with the stated NDACC specifications.

The annual meeting of the international Steering Committee (SC) for NDACC was held 10-14 September 2018 in Geneva, Switzerland at the headquarters of the World Meteorological Organisation (WMO). Geir Braathen of WMO hosted the meeting.

Model outputs generated by the Theory and Analysis Working Group are now available as netCDF files for individual stations from 1985-2017. They can be downloaded via anonymous ftp at the website ftp://ftp.cpc.ncep.noaa.gov/ndacc/gmi_model_data. The files are generated from a GMI chemistry transport model (CTM) simulation integrated with MERRA2 reanalysis meteorology. They have realistic constituent variability from daily to seasonal timescales.